Author: McChesney, P.D.
Paper Title Page
WEP149 Beam Measurement by a Wall Gap Monitor in ALPHA 1761
 
  • T.H. Luo, P.D. McChesney, P.E. Sokol
    IUCF, Bloomington, Indiana, USA
  • S.-Y. Lee
    IUCEEM, Bloomington, Indiana, USA
 
  In this report, we present our electron beam measurements with a wall gap monitor (WGM) in ALPHA injection and extraction beam lines. The WGM is first bench mark tested, and then installed in the ALPHA injection line to measure both the macro andμpulse of the injected beam and calibrate the beam current. By scanning the bending magnet before the WGM, and applying a demodulation signal processing scheme, we measured the tomography of the longitudinal phase space of the injected beam. We moved the WGM to extraction beam line and measured the properties of the extracted beam. By comparing the frequency spectrum of injected and extracted beam, we have confirmed the debunching performance of ALPHA.